Washburn race



W. RACE.

Stove Damper.

No. 11,386. Patented July 25, I854.

N. PETERS. PiwwLimo ra mr. Wailingml. 0.6.

FFIQE.

Y WASHBURN RAGE, OF SENECA FALLS, NEW YORK, ASSIGNOR TO H. G. SILSBY ANDW. RAGE.

STOVE-REGULATOR.

Specification of Letters Patent No. 11,386, dated July 25, 1854.

To all whomz't may concern Be it known that I, WVASI-IBURN RACE, ofSeneca Falls, in the county of Seneca and State of New York, haveinvented a new Mode of Regulating the Heat of Stoves, and that thefollowing is a full, clear, and exact description of the principle orcharacter which distinguishes it from all other things before known andof the usual manner of making, modifying, and using the same, referencebeing had to the annexed drawings, of which- Figure 1 is a front view ofthe regulator; Fig. 2, is a sectional side elevation.

My invention consists in a certain mode of applying and regulating theexpansion and contraction of metallic bar to act as a self regulatingdamper for stoves.

The bar acts by its expansion after. the manner of the old and wellknown regniers metallic thermometer, the principle of which consists inthe fact that for a slight movement of the extremities of the bar causedby its expansion or construct-ion a large lateral movement of'the centerof the bent portion takes place according to the law that the versedsine of the arc is twelve times the movement of the extremity of thebar. I am aware that this principle has been applied to stoves, but insuch manner that ,the regulating screw has been placed where it was toomuch heatedto approach atall times and where it was least eflicient.

My invention consists briefly in applying the regulating screw where itsaction is most sensitive and is exposed to heat the least. The screw Aand the thumb piece or nut B I place at the top of the stove as seen inthe drawings and upon the end of the expansion bar C or the rod of metalto which it is affixed. There is attached to the middle of the bar C aprojecting pin or hook D which in its movements back and forth operatesupon the damper E to open and close it, through the intervention of thelever F. According to the necessities of the case, the heat of the stoveis regulated by the set of the bent bar, obtained by screwing the upperend up or down. The action is quicker and most sensitive when the bentbar O is nearer a straight line.

Having thus described my invention, what I claim as new is Adjustingthe" stove regulator by attaching the nut and screw used for thatpurpose, at the top end of the same, and at the tops of the stove, inthe manner and for the purposes set forth; and further than this mode ofadjustment I do not claim.

J. C. PAYNE, G. O. DANIELS.

